Day 2 of my PromptFromZero series — 50 LLM techniques in 50 days, each visualized with LOOK / UNDERSTAND / BUILD.
Today: Chain of Thought (CoT). The single highest-impact prompt change you can make. Costs nothing. Adds 7 words. Often turns wrong answers into right ones.
The setup
Same problem. Same model. Two prompts.
Roger has 5 tennis balls. He buys 2 cans of 3 balls each.







